My nephew had just got it when I was visiting him in Arizona. He was planning on switching to it from his issued Glock 22 as his regular duty gun on the Phoenix PD (The Glock 19 and 17 had just been authorized for duty carry for anyone choosing to qualify with either of them), and has now, at this writing, done so.
Anyway, we went out into the desert to do some shooting (another member of his squad came with us), and I brought my Glock 17, nephew brought his duty AR, his duty Glock 22, and his new Glock 19C, which he hadn't shot yet. His squad member friend brought his AR (a personal weapon, since he's not checked out to use an AR on duty), his duty Glock 22, and his duty 870.
Had a great time shooting all the guns (we had some steel targets set at various ranges), and we all had a go with the 19C. We all agreed that it was noticeable how much the porting held down muzzle flip (not that the 19 has much to start with, but the difference was still noticeable). Something we all also noticed was the smack in the forehead from the shock wave that comes out of the port. It literally feels like a slap to the forehead with each round you let loose. I guess you could get used to it, but at first it felt very odd.
PS Both agreed that I was good enough with all the weapons we were shooting to be a cop on their PD.
That was volunteered. I didn't ask.
PPS My nephew (Instructor rated shooter on his PD) also told his buddy that I was the one who introduced him to shooting when he was a kid. I had him shooting ARs and 1911s when he was eight, and took him boar hunting when he got a little older.
Had a great time, over all. We also took in a hockey game while I was there (four rows back from the plexiglass, within ten yards of the goalie). He gave me a good natured hard time over the fact I couldn't take my Glock into the stadium, but he could take his.
Arizona lost to LA, but it was my first hockey game, and I enjoyed it, heeled or no.